Question

fill in the blank question
a car traveling 30 m/s slows down to 10 m/s in 5 seconds. the cars average acceleration is \boxed{} m/s².

Explanation:

Step1: Recall average acceleration formula

Average acceleration $a = \frac{v_f - v_i}{t}$ where $v_f$ = final velocity, $v_i$ = initial velocity, $t$ = time.

Step2: Identify given values

$v_i = 30\ \text{m/s}$, $v_f = 10\ \text{m/s}$, $t = 5\ \text{s}$

Step3: Substitute values into formula

$a = \frac{10 - 30}{5}$

Step4: Calculate the result

$a = \frac{-20}{5} = -4$

Answer:

$-4$